a sad ti sad ti
a sad ti sad ti .
ä WORD_BOUNDARY s̪̻ ä d̪̻ WORD_BOUNDARY t̪̻ i WORD_BOUNDARY s̪̻ ä d̪̻ WORD_BOUNDARY t̪̻ i WORD_BOUNDARY
a WORD_BOUNDARY s a d WORD_BOUNDARY t i WORD_BOUNDARY s a d WORD_BOUNDARY t i WORD_BOUNDARY . WORD_BOUNDARY